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Performance Characteristics; Opening Time; Closing Time; Maximum Working Frequency - Honeywell VQ400M Series Product Handbook

Class “a” combination valves
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VQ400M-Series
PERFORMANCE
CHARACTERISTICS

Opening time

The first valve (V1) opens in less than 1 second.
The second valve (V2) can be either a fast opening
valve which opens in less than 1 second or a
characterized opening valve which is adjustable
from 1 up to 30 seconds, at rated capacity.
The opening characteristic is factory set at
approximately 6 seconds at the following
conditions:
measured at 80 % of rated capacity
30 mbar supply pressure
nominal voltage
20 ° C
2,5 mbar pressure drop
no step pressure
Due to the influence of ambient temperature (-15 ...
60 ° C) the adjusted opening time of 6 seconds
measured at 80% of adjusted flow rate can vary +/-
4 seconds.

Closing time

Less than 1 second for both valves.

Maximum working frequency

VQ400M is equipped for maximal working
frequency of one cycle per minute.

Duty cycle

Coils are suitable for permanent energizing.
HONEYWELL
HONEYWELL
HONEYWELL
HONEYWELL

Operational voltage range

The combination gas valve will function satisfactory
between 85% and 110% of the rated voltage.

Designed life time

Overview of designed life time is given in the table
below.
Table 4 Number of cycles per model.
Model
Number of cycles
VQ420MA
500.000
VQ425MA
500.000
VQ440MA
300.000
VQ450MA
300.000
6
CLASS "A" COMBINATION VALVES
EN2R9081-C
October 2009

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